PBT FIE Mask backstrap retrofitting SERVICE to the 2018 FIE rules 0 23 Feb 2018 13:27 Crossed Swords Fencing Equipment PBT FIE Mask backstrap retrofitting SERVICE to the 2018 FIE rules PLEASE NOTE THIS IS A SERVICE, NOT A PRODUCT. If you return your masks to us we retrofit according to the new 2018 rules as approved for PBT FIE masks and return to y..Price: $25.00