Silicone Chainstay Protector:Made by premium silicone material, preventing the chain from shaking and continuously hitting the frame, protect your bicycle rear fork from being damaged. Good Adhesion: easy to attach, adhesive of this chain stay protector is very great, sticking very well. No need to add extra tie wraps or tape on top of this product. Function: This frame guard can protect your frame from where the chain slaps the most, fits all bike types, especially BMX, road bikes, mountain bicycles. Size: This chainstay pad has 4 sizes: Black1 - 234'50'0.2mm (20.7g); Black2 - 230'42'0.2mm (20.3g); Black3 - 232'53'0.2mm(22.7g); Black4 - 240'41'10mm (29g). Please choose the best size to your bike. Package Included: one chainstay protector. ENLEE Mountain Bike Chainstay Protector, MTB Silicone Chain Stay Frame Guard, Road Bicycle Chain Pad - Protect Your Bike Frame from Scratch by Chain Black1 - 234'50'0.2mm (20.7g); Black2 - 230'42'0.2mm (20.3g); Black3 - 232'53'0.2mm(22.7g); Black4 - 240'41'10mm (29g).