Hope Caliper Piston - Mono M4 Large / MM4 2009+ / V4 Small / E4 2013+\n16mm\n\n- To replace all the pistons in one V4 Caliper, you would need to order 2 x Large and 2 x Small pistons.\n- To replace all the pistons in one E4 Caliper, you would need to order 4 x Small pistons.\n\nA LITTLE BIT ABOUT US!\nTotal Bleed Solutions is a family run business. We are based in the North East of England and get great pleasure out of giving our customers what we believe is excellent value for money. Our now World-famous bleed kits are designed and put together in house and we are very proud to say that hundreds of thousands of them have been sold worldwide.\nTBS started when I found myself needing to bleed my mountain bike brakes. I got straight on the internet to look for a bleed kit suitable for the job.\nI was in shock to find that some sites wanted \u00A340+ for my kit - My local bike shop wanted \u00A370 to do the job!... I couldn?t believe what I was seeing and hearing. I was sure that I coul.