1020 heavy duty seed starter trays (10 pack); no drain holes, holds up to 50 lbs; sturdy, lightweight; designed for seeds, seedlings, cloning, indoor gardening, sprouts, herbs, and microgreens ecosprout designed to grow and made to last multiple uses. ecosprout growing trays were designed to withstand the weight of fully watered plants in soil. we've weight tested these trays up to 50 lbs. there are several key design features that have made our trays a huge success: 1) reusable; 2) less mess with a sturdier tray. clean with water and reuse when done. ecosprout is a service disabled veteran owned small business - thanks for your support!