VPI › HW-16 Upgrade Kit Image 1 of 1 HW-16 Upgrade Kit £156.00 All parts and accessories needed to modify your HW-16 to a 16.5 with the HW-16.5 Mod Kit (Tube, Holder, Support). Add To Cart Added! All parts and accessories needed to modify your HW-16 to a 16.5 with the HW-16.5 Mod Kit (Tube, Holder, Support). Where to buy + You Might Also Like 18” Drainage Tube & Clamp £18.00 Replacement Brushes £26.40 45 RPM Kit (Adaptor, Tube, & Holder) £168.00 Replacement RCM Switch £24.00 Replacement RCM Motors from £252.00