Ease of use and high effectiveness in both containing Lionfish and Diver Safety makes these LCU’s the preferred choice by Lionfish Hunters. All parts used in the production of each Zoo-Keeper LCU are made right here in the USA, including the rivets and paracord! The LCU’s are all custom extrude PVC tubes to achieve its light weight and color, UV resistor is added to the PVC for longer life. The flange, cap and safety valve are Zoo-Keeper’s designs. The LCU’s Flange is fused to PVC tube with adhesive and secured in place with rivets for extra protection. The safety valve allows water displacement to occur through the rear of the LCU, while prohibiting spines to come through. The paracord is added for diver convenience for attachment to lines, lanyards or clips. There are 3 sizes to choose from. The Travel/Dive Master LCU measures (L x Dia.) 19″ x 7.25″ (48.26cm x 18.4cm) and is designed for the travelling hunters. This unit is also handy for Dive Masters on a guided dive. Clients spot, while the Dive Master Z-Keeps. The Medium LCU measures (L x Dia.) 24″ x 7.25″ (61cm x 18.4cm) and could potentially hold up to 50 lionfish, depending on the size of the specimen. The Standard LCU measures (L x Dia.) 28″ x 7.25″ (71cm x 18.4cm) and could potentially hold up to 60 lionfish, depending on the size of the specimen.