Features:-- Designed for pond, pondless waterfalls and other waters conditions-- Good flexibility, Ease of installation, great Waterproof function-- Convenient to work with, can be repaired or patched-- Lightweight, lead to easier shape and install, in terms of manpower and timeFrom our years of experience, we know all of our liners perform best when laid with an aquatic underlay and for particularly stony ground we recommend you lay an inch of sand before the underlay to prevent sharp stones coming through. Liner size requirement guideUse the following formula to determine what size liner you require.Liner length required = max pond length + 2 x maximum pond depthLiner width required = max pond width + 2 x maximum pond depthOnce you have worked out how much liner you require, add 50cm to both the length and width to allow for some overlap to help secure the liner in place.Specifications:Material: HDPEColor: BlackSize: Various Sizes, optionalPackage included:1 Pcs x Fish Pool Pond Liner1 Roll Black EPDM Seam TapeNote:- All products are measured by hand and have subtle errors, please understand- Delivery time is 15-20 working days, If you do not receive the order within 30 days, please contact us.We are devote to provide happy shopping experience for our customers. If you have any question, please contact us, we will solve them in time for you.