This many of Crown Gear which come with Most commonly used crown gear. They can meet your DIY needs. I actually have extra equipment and DIY parts in my store. Welcome!! Include: C152A; C203A; C282A ;C282.5A ;C303A ;C322A (C152A Means: 15pcs tooth; 2mm gap diameter; A=Hole Tight) C28102.5B; C28082B; C20082A; C30102B; C40102B (C28102.5B means: 28pcs External teeth; 10pcs Internal tooth; 2.5mm gap diameter; B=Loose Hole) Thickness: 5mm Material: ABS plastic other Gear & Drive Device:Gear & Drive Device Go to my store: SuperModel Store Payment: We accept all price as below. Credit card, T/T bank, Moneybookers, debit card. If you've any question about payment,please feel free to touch us. If you have any problems with payment,you may well get assist from this link. http://help.aliexpress.com/pay_order.html Shipping: We will ship out parcels within 1-3days after fee approved. We use global Economy Shipping, so we don't provide monitoring numbers. If you would like a monitoring number, it's best to inform me, and pay an additional $1.5. Please understand! Order put on weekend or holiday might be shipped out on Monday or next operating day. If it is out of stock,we desire a little time to task and we can leave be aware or messages for that. We don't pay for the customs tax charged from native customs. Delivery time just for reference.It could be faster or slower sometimes.As it's not very progressively shipping via China Post Air Mail.We will process each parcelss. The approximate shipping time to various nations below is simply on your information only, which is estimated, now not guaranteed. 1: USA: 10-39 operating days. 2: Canada: 15-55 operating days. 3: Europe country: 15-55 working days. 4: Other countries: 15-55 working days. Shipping ways: We chiefly use China Post Economy Air Mail to bring your parcel. Replacement/Exchange/Refund: Please examine the kit and goods closely after receiving.If any damaged,please tack pictures as proof first.Then it's essential to touch us for after sale service. Please kindly touch us first if ther is any issues of your order earlier than opening dispute.Thanks to your knowing and support.We will solve until making each customer convinced in a reasonable way. If you do not receive parcel within warrantly time,please kindly look forward to extra time.Your parcel may be not on time by huge parcels for post,so they job slowly than normal. 1: We accept change or replace inside 14-30 days for defective item Or when you acquired the incorrect item. Or we can refund your money back. 2: Buyers who buy a flawed merchandise must contact with us in time, notwithstanding if the wrong item we sent out and also you want us to resolve it, Then you need to have enough money all of the fees (includes original freight, dealing with expenses and the return freight, etc.) 3: Unwished product returns could be charged a 15% restocking commission only if merchandise is similar to the situation as which we sent out. Buyer must pay for the delivery fee to ship goods back. Feedback: Your feedback is terribly important for our store.So please touch us directly before leaving adverse suggestions if there something make you are not satisfied or angry.We will try to solve challenge till you are satisfied. If you are convinced with our store.Please depart a positive feedback.And useful comments for other customers. Item as describes:5 stars communication:5 stars Shipping Speed:5 stars