Brass shank. Height adjustable from 9 to 14". Durable materials stand up to millions of flushes. Plastic Body & Brass Shank Height: 9-14" Suitable for High & Low Pressure Systems For use with Bottom-Entry Cistern 1/2 " Simple to Install without Special Tools Fast Refill with Absolute Shut-Off Easy to Access & Simple to Change Compact Efficient Design, Fits Today's 6-Litre Cisterns Anti-Siphon / Backflow Design Prevents Contamination Also Available with a European 3/8" Shank Plastic Body & Brass Shank Height: 9-14" Suitable for High & Low Pressure Systems For use with Bottom-Entry Cistern 1/2 " Simple to Install without Special Tools Fast Refill with Absolute Shut-Off Easy to Access & Simple to Change Compact Efficient Design, Fits Today's 6-Litre Cisterns Anti-Siphon / Backflow Design Prevents Contamination Also Available with a European 3/8" Shank